To subtract integers, change the sign on the integer that is to be subtracted.

If both signs are positive, the answer will be positive. Example: 14 - (-6) = 14 + 6 = 20

If both signs are negative, the answer will be negative. Example: -14 - (+6) = -14 - 6 = -20

If the signs are different subtract the smaller absolute value from the larger
absolute value. The sign will be the sign of the integer that produced the larger
absolute value.
Example: 14 - (+6) = 14 - 6 = 8
Example: -14 - (-6) = -14 + 6 = -8